Ice-cream-making machine.



J. WILLMAN N ICE CREAM MAKING MACHINE. APPLIOATION rILEp JAN. 7, 1910.

963,675. Patented July 5,1910.

3 SHEETS-SHEET 1v.

J. WILLMANN. ICE GREAM MAKING MACHINE. APPLICATION FILED JAN. 7, 1910.

4Patented July 5, 1910.

3 SHEETS-SHEET 2.

JI WILLMANN. ICE CREAM MAKING MACHINE. APPLIUATION FILED IAN. 7I 1910.

9 513,675, Patented July 5, 1910.

3 SHEETS-SHEET 3.

UlTE

. JOSEPH WILLMANN, .or DERBY, CONNECTICUT.

fenomeen-MAKING MACHINE.

esagera.

To all 'whom 'it may concern:

Bev it known that I, JOSEPHWILLMANN, a subject of the Emperor of Germany, residing at Derby, in the county of New Haven and State of Connecticut, have invented new and usefullmprovements in Ice-Cream- Making Machines, of which the following is a specification.

My present invention rela-tesj'to improvements in ice cream freezers and more especially to the type having a relatively large capacity and wherein the operative parts of the freezer are driven by power, and it'has for its object tov provide an ice cream making machine of a generally improved construction, the present improvements relating more particularly to the mounting of the freezer upon its support whereby it may be tilted or moved outy of its normal operative position inorder to facilitate cleaning thereof. A simple but eflicient device is pro.- vided for locking tliefreezer in operative position relatively to the driving gear, and an improved arrangement is provided whereby the thrust or strain of the driving gears is sustained by a relatively solid standard or support and is thereby relieved from the freezer. i

@ther objects of the invention are to provide a simple but efficient gate for controlling the discharge of the frozen cream from the freezer, to providesimple but efficient means for supplying fresh liquid y to be frozen and under proper control lto the freezer and, in general, to improve the construction of the machine in many respects.

-To these and other ends, the invention consists' in certain improvements, and combinations and arrangements of parts, all as will be hereinafter more fully described, the novel features being pointed out particularly in the claims at the end of the speci-v fication. Y

fn the accompanying drawing: Figure 1 represents a sideelevation ofan ice cream 'freezing machine constructed in accordance with the present invention; Fig. 2 is a front elevation of the machine as viewed from the right in Fig. l, portions of the freezer casing being broken away to disclose the connections between the freezing coil and the brine supply and discharge pipes; Fig. 3 represents a central vertical section through the upper portion of the machine showing the driving gear and the upperportion of4-^ the freezer; F ig. 4 represents a transverse Specification of Letters Patent.

` Patented July 5, ie'io.

Application filed January 7; 1910. Serial YNo. 536,810. v

section on the line 4-4 of Fig. 3; Fig. 5 represents a central longitudinal section of one of the swivel connections for the brine pipe; Fig. 6 represents-a central vertical section through a portion of the standard and the lower portion of the freezer disclosing particularly the discharge gate; Fig. 7 is a bottom plan view of the part shown in Fig..6; Fig. 8 represents a section' on the line 8 8, Fig. 3; and Fi .'9 is a detail sectional lview of portions o the supply reservoir and the freezer showing the valve for controlling the flow of liquid Vinto the` freezer. l

Similar parts are designated by the same reference c aracters 1n the several views;

v,lin the accompanying drawing, I have ard l having a suitable base 2 which preferably provides a support for a receptacle to receive the frozen material, and the standardprovides a support' for a driving shaft 3 having suitable driving pulleys 4, and this main shaft 3 is connected throu h the bevel gearing 5 to the horizontal sha t6, the latter being preferably journaled in a suitable bearing formed in the upper portion of the standard, this shaft 6 carrying a bevel gear 7 at its forward end which is closed by a gear case 8 which is formed in the upper ortion of the standard and is .closed at the ront 'by avremovable cover section 9, the latter being so constructed that it may be readily applied and removed when necessary. A bracket 10 projects forwardly from the standard and is divided to form a pair of vforwardly directed pivot arms 1l, and the freezer 12 isfsup' orted by this bracket.

lin order that the reezer may becleaned with facility, it is ivotally mounted on the bracket whereby a ter the drivin :j mechanism has been disconnected from t e freezer, the latter maybe swung'or tilted forwardly into a horizontal or nearly horizontal position and while the freezer isin operative position, this bracket serves to supportv it.

In the present instance,the freezer embodies an inner cylindrical can 13 to contain the cream or material to be frozen. Inorder to insure a rapid and uniform freezing of the .af cream, a scraper and -av dasher are mounted to Vrevolve in reverse directions within the can, the scraper in the present instancecomprising a hollow frame 14 having scraping `blades 15 pivotally mounted thereon so as to constantly and thoroughly remove the vmaterial from the inner side of the can surface, this scraper frame having a sleeve 16 provided with a bevel gear 17 which coperates with the bevel gear 7.

The dasher 18 is provided with the usual inclined blades 19, the dasher revolving within the hollow scraper frame and is carried 4,by a vertical shaft 20 which extends angular .head 21.

head., The sha through the sleeve 16 ofthe scraper andis' bearing 24 formed in the to of the standv ard and has a hard'metal bus ing 25 threaded or otherwise inserted in its lower end, this bushing having a socket or opening corresponding in shapeto the uare or angular head 21 on the dasher sha Aso that when the shaft 23 is lowered, it will be coupled to the dasher throu h the bushing and angular 23 is so mounted in the bearin 24 as to permit of vsuiicient longitudina movement to couple and 'uncouple it with 'respect to the dasher, and any suitable means may be provided for shifting the shaft. In the present instance, a common form of device for effecting this purpose is provided embodying a-lever 26 which is pivoted -to the frame at 27 and is oper atively connected toa sleeve 28 'loosely' mounted upon the shaft 23 between the limiting collars 29, al link 30 being pivoted to a suitable part of the standard and coperating with the lever 26-in conjunction with a clamp 31 whereby the lever and consequently the shaft 23 may be secured either in elevated or lowered position. In order that V.any driving strain between the driving shaft and the freezer may be sustained by the standard, a bearing'is provided on the standard to coperate with the dasher sleeve 16 at a point beneath the gearing, this bearing in the present instance being formed of two sections, the section 32 being preferably inte al `or permanently fixe to the standar while the complemental se ental section 33 is formedseparatel an is detachable with respect to the stan ard, a pair of clamping bolts 34 being yprovided -for securing the detachable bearing section in operative position. These clamping bolts are preferably pivoted to the stan ard' as 'at' 35 in order to facilitate the The freezer can is surrounded by a freez ing coil adapted for the circulation of a brine or freezingv mixture. In the present instance,ythe coil is composed of a length of tubing 36 which is segmental or semi-circular in cross-sectionpand is coiled helically about the exterior of the can, the longitudinal edges of the tubing being bent laterally and sweated, soldered or otherwise permanently united by a fluid-tight joint with. the can. Any suitable provision may t be made to insulate the can and its freezing coil from the, atmosphere, a pair of inner and outer shells 37 bein provided between which may be packed as estos or other heat insulating material 38, and the can with 'its insulating jacket is united in the well known manner by the use lof a flange 39 at the top and a base plate 40 at the bottom, the base plate 40'closing the `bottom of the can while a cover plate 41 ma be provided to close the top of the can. his cover plate 41 may be seated in an annular depression 42 formed in the flange 39 and it may be detachably secured'in position by means of a suitable number of pivoted catches 43 Iwhich are car-` ried by the flan e 39 and have ortions wlhichare adapte to project over the cover ate. p In order to firmly support the can in operative position land thereby relieve the driving mechanism of any strain, the flange 39 is provided with an upwardly projecting lug 44 which is arranged to pass into a space formed between a pair of opposed projec tions 45 referably formed integrally with the stan ard, and a clamping screw 46 is .tapped into one of these projections and when ti htened coperates with `the lug 44 to rigidy lock it in position. A

The base plate 40 of the freezer is pivotally mounted upon the arms 11 of the supporting bracket by means of bolts 47 which pass through the larms 11 and pairs of depending hinge lugs 48 which may be formed as integral parts of the base plate, the forward ed es of the arms 11 1n thev resent instance eing provided with shoul ers 49 which constitute vsto s to coperate with the Vunder side of the Ease plate and thereby limit the forward tiltin movement thereof, the freezer being there y supported firmly during cleaning.

The -brine or7 freezing mixture is conducted to and from the coil 36 by pipes 50 `and 51 and inorder to yrender it unnecessary to disconnect the'brine pipes during the ti1t forma .handle 77. In order to retain the curved arms 81 may be provided w ich inc 4the freezer through an outlet 57 formed in 4the can with respect tothe standard and ing of the freezer, ordinary swivel connections 52 and 53 may be provided for these pipes. In Fig. 5, I have shown a detail view of the swivel 53 which is connected to the outlet pipe, the elbow 54 being connected to the section 55 preferably by a ground tapered joint which joint is kept tight by means of aenut 56.

The frozen material is discharged from the base plate 40, and this outlet is controlled by a gate which in the present instance comprises a slide 58 which is guided to reciprocate between a pair of guides 59 so as to cover and uncover the outlet. In order to insure a proper seating of the sliding gate, the latter is provided witha stem 60 which is surrounded by a helical compression spring 61, this spring acting at one end against the under side of the sliding gate 58v and thereby tending to press the same closely against the under side of the base plate while. the springis inclosed by a sleeve 62 lwhich has an adjustable cap 63 threaded upon its lower end and receives the )ressure of the lower end f of the spring.' `his inclosing sleeve62 is provided with a Han e 64 which rests in a recess 65 while the` ody portion of the sleeve 62 extends through a slot 66 formed in an operating lever 67, the latter being pivoted to a part fixed to the base plate through the medium of a pivot bolt 68 while its'opposite or free end is guided in a groove 69 formed in one of the guides 59.

In order to facilitate the introduction of the liquid to be frozen into the freezer, a reservoir or tank 70- may be suitablysupported above the freezer, this tank in the present instance having a spout 71 which leads to an inlet 72 formed in the cover plate 41. In order to control the tlowof vthe liquid into the freezer, a valve 73 is provided which has a seat 74 leading to the spout 71, and the stern 75 of the valve extends lthrough la guide 76 and is prolonged t0 valve in open position during the ow of the contents of the tank into the freezer,

the valve stem is provided with a pin or projection 78 which operates in a vertical slot 79 formed in the guide 76 and whenv the valve has been fully opened, a partial rotation of the valve stem will bring theI pin or projection 78 into a position to enter the. notch or depression 80 formed in the top of the guide 76, a releasing of the pin` or projection from the notch enabling the valve to move into closed position by gravity.

In order to center the upper portion of,

the driving gear carried thereby, a air of the present instance proceed from the oppo-v pivote site sides of the standard and are curved to conform substantially to the curvature of the outer jacket of the freezer.

' Ordinarily, theparts of the machine occupy the relative positions shown in Figs. 70 1, 2 and 3, motion being imparted from the shaft 6 and its gear 7 to the reversely arranged bevel ears 17 yand 22 causing the scraper and dasher to revolve simultaneously in reverse directions, the frozen cream being discharged from time to time by an opening of the gate at the bottom. When, however, it becomes necessary or desirable to clean the. can, the lever at the to of the machine is lifted, thereby uncoup ing. the shaft 23 from the dasher shaft, and after removal of the gear cover 9 and the detachable bearing section 33, the freezercan be swung forwardly about the pivots 47 as an axis until arrested by the stops4 49, thefreezer being thereby supported in a position convenierit for cleanlng.

I claim as my invention:

1. In an icecream making machine, the combination of a standard carrying a driving gear, a freezer tiltably mounted at its lower end upon the standard and operatively connected at its upper end to said driving gear, and a locking device connecting the u per portion of the standard and the top of) the freezer adjacent to its point of connectiony with the driving gear for permanently 'supporting the freezer'in upright operative, position.y

2. Iii an ice cream making machine, the 100 combination of a standard provided with a drivin gear at its` upper portion, a freezer iiy connected at the bottom to the standard and capable of occupying two different positions bv a tilting motion, the op- 105 l erati've parts of the freezer being connected at the upper end of the freezer to the drivingy gear of the standard, and a lock between they freezer and standard for rigidly support-ing the freezer in -o erative position comprising a lug on one o the parts, a pair of spaced projections on the otherf art adapted to receive said lug between tiem during a portion of the tilting movementof the freezer, and a device' for retaining said 115 lug in locking position between said projections. 3. In an ice cream making machine, the combination of a standard rovided with j driving ear, a freezer, pivota ly mounted on 12u theI stan ard and having its operative parts detachably connected to the driving gear on the standard, and means for locking the freezer in operative relation to the standard comprising a pair of spaced projections on the standard, a lug secured to the freezer and movable into a position between said .projections as the freezer moves into operative posit-ion, and a clamping screw tapped into one of said projections and cooperative with said lug to -firmly clamp the latter in `the standard.

5. In an ice cream making machine, the combination ef a standard having a bracket projecting forwardly therefrom,l a freezer pivotally connected to said bracket whereby the freezer maybe tilted fromavertical to a substantially horizontal position, and

. 'stops formed upon the bracket adjacent to said driving shaft for the .agitating deviceI the pivotal connection between the latter and4 the freezer and coperative with the bottom of the freezer' to support the latter in tilted position.

6. In an ice cream making machine, the combination of a standard provided at its upper portion with a driving ear, a freezer ti tably mounted onthe stan ard and containing a revoluble agitating device, a driving' shaft for the agitating device carried by.

the freezer and detachably connected to the driving gear onv the standard, and-a split .bearing rigidly supported by the standard and arranged to receive and coperate with ofthe freezer when the freezer into upright posit-ion, said bearlng when closed sustaining the thrust between, the driving gear of the standard and the drivi s brought ing shaft carried by the freezer, and when opened, permitting said driving shaft to be disengaged lateral y therefrom and allowing the freezerto be tilted from an operative position to a cleaning position. '1

7. In an ice cream making machine, the combinationV of a standard provided with driving gear, a freezer tiltably'su ported at its lower end on the standard and) provided with a revolving scraper having an operating sleeve and gear, the latter being arranged to coperate with the driving gear on the standard, means ri idly connecting the up er ortion of the tg an a earing rigidly fixed to the standard and coperative Iwith .the sleeve for the scraper, said bearing havin a detachable section adapted to be remove to permit tilting of the freezer from an operative to a cleaning posit-ion.

8. In an ice cream making machine, the combination of a standard, driving gear thereon involving a verticall movable and revoluble dasher operating s aft, a freezer tiltably supported on the standard, a dasher posed between said lever and a discharge opening, a slldable reezer to said standard contro pivoted` at an intermediate point to the botrevoluble in the freezer and 'having a shaft provided with an an lar operating head, and avhard-metal bu ing threaded axially into the lower end of the vertically -movable dasher operating shaft and having an angulr socket to receive the head of the dasher sha t.

9. In an ice cream freezer, the combination of a can to contain the material to be frozen, a bottom plate for the can provided with a discharge opening, a reciprocatory gateu slidably mountedat the underside of the bottom plate for controlling the discharge opening, and a spring yie dably acting on the gateto retain it in coperative relation 'with the under side of said bottom plate. l I

- 10. In an ice cream freezer, the combination of a can, a bottom plate therefor provided with a discharge opening,a reciprocatory gate slidably .engaging the under side of said bottom plate, a lever ivotally connected to .the bottom plate an operatively connected to the gate to reciprocate the latter, and a spring interposed between saidA lever and gate for yieldably retaining the latter in coperative relation with the bottom plate. V

11. In an ice cream freezer, the combination of a can, a bottom plate rovided with a discharge opening, a gate s idably engaging the under side of said bottom plate for controlling said discharge opening, a lever pivotally mountedwith respect to the bot-l tom plateand operatively connected to the gate to reciprocate the latter a spring intergate foryieldably pressing the latter against the under side of 'said bottom plate, and means cooperate with a free end of said lever for holdin the latter in operative position.

12. n an ice cream freezer, the combination of a can, a bottom plate provided with gate coperative with the underside of said ottom late and carrying apin, a lever pivotally re ated to the bottom plate and havlng a slot, a compression spring encircling the pin on the gate, anda sleeve incasing the spring and operatively connected at one end to the lever and provided with an adjustin cap at its opposite end coperative with te spring.

13.. In an ice cream freezer, the combination of a can, a bottom plate provided with a discharge opening, arallel guides secured to the under side ofpsaid bottom late, a sliding gate coperative with said guides for ling the' discharge opening, a lever tom plate and operatively connected to the sliding gate and havin one of its ends engagin a groove forme in one of the guides.

14. In an ice cream making machine, the combination of a standard provided at its upper portion with a driving gear, a freezer tiltably supported at its lower end on the standard and containing a revoluble Scraper provided with an operatin shaft and gear which are tiltable with the reezer, said gear being arranged to coperate with the driving gear on the standard when the freezer is arranged in upright position, means rigidly connecting the upper portion of the freezer to the standard, and a split bearing formed on the upper portion of the standard and adapted to coperate directly with said operating shaft to maintain the gear thereon in proper mesh with the driving gear on the standard, and serving when opened to release said operating shaft and permit the same together with the freezer to be tilted into a cleaning position.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOSEPH WILLMANN. Witnesses:

CAROLINE L. WHEELDEN, W. A. SIMON. 

